Learn French: Il me semble que votre interprétation est très subjective. - It seems to me that your interpretation is very subjective.

This ties into your current lesson! The phrase il me semble que (it seems to me) expresses a personal opinion that you firmly believe to be true. Because you are stating what you consider to be a fact in your own mind, it takes the indicative.

How would the meaning and grammar change if I dropped the me and just said Il semble que?

If you use il semble que, you are making a general statement of appearance or rumor, meaning 'it seems that' or 'it appears that'. This removes your personal certainty and introduces a strong element of doubt, which means you must use the subjunctive: Il semble que votre interprétation soit très subjective.

If I make the sentence negative, do I keep the indicative?

No, you would need to switch to the subjunctive. While the affirmative il me semble que shows certainty, the negative il ne me semble pas que introduces doubt. You would have to say: Il ne me semble pas que votre interprétation soit très subjective.

Why is the adjective at the end spelled subjective instead of subjectif?